//
//  UIControl+fixManyClick.m
//  CYWFrame
//
//  Created by Macx on 2017/12/29.
//  Copyright © 2017年 Macx. All rights reserved.
//

#import "UIControl+fixManyClick.h"

@implementation UIControl (fixManyClick)

- (NSTimeInterval)timeInterval

{
    
    return[objc_getAssociatedObject(self,_cmd)doubleValue];
    
}

- (void)setTimeInterval:(NSTimeInterval)timeInterval

{
    
    objc_setAssociatedObject(self,@selector(timeInterval),@(timeInterval),OBJC_ASSOCIATION_RETAIN_NONATOMIC);
    
}

//runtime动态绑定属性

- (void)setIsIgnoreEvent:(BOOL)isIgnoreEvent{
    
    objc_setAssociatedObject(self,@selector(isIgnoreEvent),@(isIgnoreEvent),OBJC_ASSOCIATION_RETAIN_NONATOMIC);
    
}

- (BOOL)isIgnoreEvent{
    
    return[objc_getAssociatedObject(self,_cmd)boolValue];
    
}

- (void)resetState{
    
    [self setIsIgnoreEvent:NO];
    
}

+ (void)load{
    
    static dispatch_once_t onceToken;
    
    dispatch_once(&onceToken, ^{
        
        SEL selA =@selector(sendAction:to:forEvent:);
        
        SEL selB =@selector(mySendAction:to:forEvent:);
        
        Method methodA =class_getInstanceMethod(self, selA);
        
        Method methodB =class_getInstanceMethod(self, selB);
        
        //将methodB的实现添加到系统方法中也就是说将methodA方法指针添加成方法methodB的返回值表示是否添加成功
        
        BOOL isAdd =class_addMethod(self, selA,method_getImplementation(methodB),method_getTypeEncoding(methodB));
        
        //添加成功了说明本类中不存在methodB所以此时必须将方法b的实现指针换成方法A的，否则b方法将没有实现。
        
        if(isAdd) {
            
            class_replaceMethod(self, selB,method_getImplementation(methodA),method_getTypeEncoding(methodA));
            
        }else{
            
            //添加失败了说明本类中有methodB的实现，此时只需要将methodA和methodB的IMP互换一下即可。
            
            method_exchangeImplementations(methodA, methodB);
            
        }
        
    });
    
}

- (void)mySendAction:(SEL)action to:(id)target forEvent:(UIEvent*)event

{
    
    if([NSStringFromClass(self.class)isEqualToString:@"UIButton"]) {
        
        self.timeInterval=self.timeInterval==0?defaultInterval:self.timeInterval;
        
        if(self.isIgnoreEvent){
            
            return;
            
        }else if(self.timeInterval>0){
            
            [self performSelector:@selector(resetState) withObject:nil afterDelay:self.timeInterval];
            
        }
        
    }
    
    //此处methodA和methodB方法IMP互换了，实际上执行sendAction；所以不会死循环
    
    self.isIgnoreEvent=YES;
    
    [self mySendAction:action to:target forEvent:event];
    
}

@end
